Loading machine



Aug. 28, 1945.

J. E. RYAN LOADING MACHINE Filed May 29, 1944 5 Shee'ts-Sheet 1 JNVEIVTOR Jax; Ryan fly A TI'O/P/VEY J. E. RYAN LOADING- MACHINE Aug.'28, 1945.

Filed May 2 9, 1944 5 Sheets-Sheet 2 u as 49 3 2 I 4 9 6 I 9. a 2 1 5 w w v e .n. w 0 5 J m E m m Mm/ran jafih 5 Ryan 7W X K ATTORNEY Aug. 28, 1945. J. E. RYAN LOADING MACHINE Filed May 29, 1944 5 Sheets-Sheet 3 [All/E70 g/a/fl 5 Ryan- 4/ WXM ATTORNEY- Aug. 28, 1945. J. E. RYAN LOADING MACHINE Filed May 29, 1944 5 Shets-Sheet 4 v [NIKE/V701? John E Pym; WXXM ATTORNEY Aug. 28, 1945; J. E RYAN v 2,383,686

A LOADING MACHINE Filed May 29, 1944 5 Sheets-Sheet 5 Patented Aug. 28, 1945 UNlTED stares price i LOADING MACHINE John E. Ryan, Stuart, Iowa, assignor to Ryan Floating Stacker Company, Stuart, Iowa, a copartnership Application May'29, 1944, Serial No. 537,867

8 Claims.

tor. This application is a continuation inpart of my c0-pencling application Serial No. 453,043 filed on September 11, 1942, now Patent No. 2,- 352,915 granted July 4, 1944.

An object of my invention is to providean im:- proved loading attachment for a tractor.

A further object of my invention is to provide a stacker, attachable with a tractor for movement with the tractor, capable of building a stack in the neighborhood of twenty-two feet high and readily collapsible so as to permit the stacker being moved along a highway in a clearance'relation with usual overhanging electric and telephone wires.

Yet another object of my invention is to provide a loading machine having a collapsible up right frame for movably supporting a flexible lifting means when the frame is either in a collapsed or an upright position, so that the loading machine is readily applicable for low lifting work in handling dirt and manure, or high lifting work such as required in stacking hay or the like.

A still further object of my invention is to provide a loading machine in which a pair of pivoted lifting arms are arranged at opposite sides of the stacker and constructed and assembled relative to a supporting frame for the machine such that when the arms are in their lowermost position any force exerted in a rearward direction on the arms is applied against the supporting frame on the pivotal support for the arms.

Yet another object of my inventionis to provide a loading machine having a pair of oppositely arranged lifting arms pivoted at their rear ends on a supporting frame and having a loadcarrying unit pivoted between their front ends, in which the load-carrying unit is pivotally movable, at any moved position of the arms and while in a load carrying position, for movement to a substantially horizontal position. I

A feature of my invention is found in the provision of a loading machine having an upright frame and a collapsible frame pivoted at one end on the upright frame for movement to a collapse position extended rearwardly of the upright frame, and to an upright position on the upright frame. Pulleys adjacent the top of the upright frame, and adjacentthe free end of the collapsible frame are operatively associated with a flexible lifting means which is supported from the pulleys on the upright frame when the collapsible and not frame is in a collapsed position, and from the pulleys on the collapsible frame when such frame is in an extended position on the upright frame.

Further objects, features and advantages of this invention will become apparent from the following description when taken in connection with the accompanying drawings in which:

Fig. l is a side elevational View of the loader attachment of my invention in assembly relation with a tractor andsho-wing the collapsible frame in an extended position and a load-carrying unit at its maximum elevated position;

Fig. 2 isa front elevational View of thea-ssembly shown in Fig. 1; I I

Fig. 3 is a sectional view on the line .3-3 in Fig. 2;

I Fig. 4 is a plan view of the assembly shown in Fig. 1;

Fig. 5 is a sectional view taken on the line 5- -5 in Fig. 8 showing the support of the load-carrying unit with the pivoted lifting arms; I

Fig. 6 is a sectional View takenon the line 6- -6 in Fig. 5 showing means for automatically returning the scoop to a load-carrying position from a dumping position; a

Fig. 7 is an enlarged fragmentarydetail'view of the automatic return mean shown in Fig. 5;

Fig. 8 is illustrated similarly to Fig. l and shows Fig. 12 is a rear perspective view of the supf porting means for the pivoted lifting arms. a 7

With reference to the drawings the loader attachment of my invention is shown in Figs. 1, 2 and 4 in assembly relation with a usual farm tractor having a frame l5, front wheels 16 and rear wheels I! mounted on a rear axle H3. The loader attachment is a preassembled. portable unit and. includes what I shall refer to as a portable frame l9 and a load carrying frame 2i]. i he portable frame I9 has a front member.2| and side members 22 of a channel iron construction the members 22 being spaced a distance apart and of a length to receive the tractor therebetween (Fig. 11). The rear ends of the members 22 are connected by an arch 23 of a height to permit line the tractor being driven therebeneath, while providing suitable head clearance for the operator v of the tractor. The arch 23 is supported in an upright position by brace members 24 connected between the arch and the frame members 22. The front member 2| carries an upright bracket 26 which is pivotally connected at 25 with an upright bracket 21 supported on an axle unit 28 provided with caster wheels 29.

The rear ends of theframe members 22 are provided with adjustabl skids 3| manually adjustable by levers 32 to raise and lower the rear ends of the members 22. By virtue of this adjustment the rear ends of the members 22 are capable of being lifted to a height such that auxiliary axle members 33 detachably connected 'to the rear wheels ll of the tractor are receivable between the legs of the channel frame members 22 as the tractor is driven into the space between the members 22. With the auxiliary axles 33 thus received within the frame members 22, the rear end of the frame member I9 is supported on the tractor, after which the levers 32 may be operated to lift the Skids 3| out of contact engagement with the ground.

The auxiliary axles 33 are retained against movement relative to the frame members 22 by adjustable clamping plates 31 mounted on the frame members 22 to opposite sides of the axles 33 and. in contacting engagement with the axles (Figs. 4 and 11). The forward end of the tractor is connected to the forward end of the portable frameby means of adjustable links 34 each'of which is connected at one end 36 to the front member 2| and at an opposite. end to the front end of the tractor frame |5.

The portable frame l9 and its assembly with the tractor for movement withthe tractor isdescribed in detail in my co-pending application Ser. No. 458,043. v

The load-carrying frame includes a front upright frame 38 comprised of a pair of oppositely arranged upright frame members 39 of a channel shape connected together by crossed brace mem-. bers 49 (Fig; 1). Extended rearwardly from the upper end of the upright frame 38 are a pair of frame members 42 also of a channel shape connected together by crossed brace members 43. The rear ends of the frame members 42 (Fig. 12) are connected together by a frame member 44 and an upright member 46 of inverted U-shape. The front upright frame 38, the framemembers 42 and the U-shape member 48 are connected together by oppositely arranged inclined brace members 41 each of which has one end terminating at the member 45 and an opposite end adjacent the lower ends of the upright members 39 in the frame 38.

In the assembly of the load-carrying frame 29 on the portable frame Hi the upright frame 38 is supported on the axle 28 of the portable frame, and the member 44 at the rear, ends of frame members 42 is pivotally supported on the arch 23 by a pivot bolt 48 (Figs'l and 12). It is thus seen that as the portable frame is advanced along the ground the front axle 28 is pivotally movable relative to the frame members 2| and 22, to in turn provide for a pivotal movement of the loadcarryingframe 20 about the pivots and 48 relative to the portable frame l9. It is seen, therefore, that the pivotal support of the loadcarrying frame 28 on the axle 28 and on the arch 23 provides for its pivotal movement in a plane transversely of the portable frame [9 whereby it is maintained in an upright position regardless of the differences in elevation of the ground surface over which the tractor and portable frame are traveling. This pivotal support of the loadcarrying frame on the portable frame is covered in detail in my co-pending application Serial No. 458,043.

Arranged at opposite sides of the load-carrying frame 20 is a pair of pivoted lifting arms 49 rigidly connected together at their rear ends by a shaft 50, which is pivotally supported in bearing mem bers 55 oppositely arranged adjacent to the tol "and on the forward side of the U member 46 (Figs. 4 and 12). As best appears from Figs. 1 and 8 each arm 49 is formed with a straight body portion, and a front portion comprised of a section 5| inclined laterally outwardly from the main body portion, and a second section 52 which is at right angles to and extended forwardly from the section 5|. Thus as shown in Fig. 8 when the arms 49 are in their lowermost position the straight body portions thereof terminate at the bottom and forwardly of the upright frame 38, with the section 5| in an upright plane and located forwardly of and in contacting engagement with the front surface of the axle 28, for a purpose which will be later explained. At this lowermost position of the arms 49 the section 52 is located adjacent the ground and extended forwardly from the upright frame 38 in a substantially horizontal plane.

Movably supported between the sections 52 is a load-carrying unit 53' which although I have illustrated in the drawings as a scoop may be either a scoop or a hay buck (Figs. 5, 6 and 8). The

scoop 53 is pivotally supported on pins 54 at the adjustably supported at the front ends of the sections 52 by means including a bolt 53 extended transversely through a section 52 and an arcuate. slot 59 formed in the front end of a plate member 56. On loosening of the bolts 58 the plates 56 are pivotally movable about their pivots 51 to provide for an adjustment of the scoop 53 to the ground surface. On tightening of the bolts 58 the plate members 56 are held against relative movement relative to a corresponding section 52. The pivot supports 54, for the scoop 53, are located in the arc of the slots 59 so that the position of the scoop longitudinally of the sections 52 remains substantially unchanged during its vertical adjustment as accomplished by the pivotal adjustment of the plates 56. 7

As I have previously explained the sections 5E on the lifting arms 49 are in a position adjacent to and in contacting engagement with the front side of the axle 28 when the arms 49 are in their lowermost positions of travel. It is thus seen that on a forward advance of the tractor, when the scoop 53 and arms 49 are in their relative positions shown in Fig. '7, any force applied rearwardly on the scoop 53, such as occurs during a usual bucking operation, is exerted against the sections 5| and applied directly to the axle 28 so that the pivot supports for the rear endsv carry the complete bucking force applied on the scoop 53 during abucking operation.

'Pivotally supported adjacent the top of the front upright frame 38 is an extendible or collapsibleframe 6| comprised of a pair of oppositely arranged frame members 62 of a channel shape provided at the supported end of the frame 6| with extensions 64 of a right angle shape hav ing one leg 65 positioned against the inner side of a corresponding frame member 62, and a; second leg 66 positioned against the top sideof a member 62, as viewed in Fig. 8. The lower side of a member 84, as also viewed in Fig. 8, is extended below the level of a frame member 62 and is pivotally connected at such extended portion, by a pivot pin 68, with a rear extension 61 adjacent the top of a member 39 in the upright frame 38. It is thus seen that the pivot 68 between a frame member 62 and a corresponding frame member 39 is immediately adjacent to the top and at the rear of a frame member 39 whereby to provide for a frame member 62 being pivotally moved in an upright position in longitudinal alignment with a corresponding member 39, as shown in Fig. l.

The free end of a plate member-64 carries a pin 69, in its leg 65, which is slidably received in a slot extended longitudinally of a pivoted member 12 pivotally supported at 13 adjacent its lower end on a member 39 in the upright framefifi, and having its upper end projected above the top level of the upright frame 38 (Figs. 8 and 9). The member 12 is of a right-angle shape with the slot 1| being formed in a leg 15 thereof which is slidably movable on the inside of a frame member 39. The other leg 14 of the pivoted member 72 is movable toward and away from a position against the front side of a member 39.

When the collapsible frame 6| is in an upright or extended position on the front frame 38, as shown in Figs. 1 and 2, the leg 66 of the connecting member 64 is extended across the junction of corresponding members 39 and 62. The leg 14 of a member i2 is also extended across the junction of corresponding members 39 and 62 and over the leg 66 of the member 64 as shown in Fig. 1. This nesting engagement of the members 64 and T2 (Fig.8) which is accomplished by the pin and slot connection 69|| between corresponding members 84 and 12 defines the upright position of the frame 9| on the frame 38,:and

maintains the frame 6| against pivotal movement forwardly of the. frame 38.

When the frame 6| is in its upright position it is retained against pivotal movement rearwardly by a-collapsible supporting frame, comprised of a pair of brace rod l6 (Figs. 2 and 4) pivoted at their rear ends at ll on the frame members 42 and pivoted together at their forward ends by a pivot pin 18, and brace rods 19 pivoted at their forward ends at 8! adjacent the free ends of the members 62, of the collapsible frame 6|, and pivoted together at their inner ends by the pivot pin iii. The front ends of the brace members 16 are formed with extensions 82 adapted for mating engagement with the rear ends of the brace members 19. Thus on movement of the collapsible frame 6| to an upright position the brace members 76 and 19 are relatively movable into a common plane, and then held against relative movement by loop members 83 slidable on the brace members 79 and about the extensions 820i the brace members 18. The brace members 16 and 19 when thus connected together ment. In order to collapse the frame 6| the loop members 83 are moved out of an engaging position with the extensions 82 whereby the brace members 16 and 19 are freely movable about their commonpivot 18 and the pivots 1! and 8|, respectively.

The collapsed positionof the frame 6| is defined by-the engagement of spaced rear stops 81,

carried on a transverse frame member 88 extended across the free end of the frame 6|, with the top sides of the frame members 42 (Figs. 4 and 8). At this position the frame BI is inclinedrearwardly and downwardly from the upright frame 38 so that it is inclined downwardly and rearwardly from a horizontal plane extended through the pivot 68 connecting the members 64 and 12. During the rearward pivotal movement of the collapsible frame 6| the pins 69, on the members 64 extended from the lower end of the frame member 62, engage and pivotally move the members 12 in a direction forwardly of the upright frame 38, so that the upper ends 84 of the members 12 are projected forwardly of the upright frame 38.

The pivoted lifting arms 49, and in turn the scoop 53, are capable of being lowered and raised when the collapsible frame 6|is in its collapsed position shown in Fig. 8, or in its extended position shown in Fig. 1, by means including a pair of like flexible lifting means 89 each of which is operatively connected at one end with a corresponding winding drum 9| of a winding mechanism indicated generally at 95 and connected at an opposite end to a sleeve 92 loosely supported on a rod 93 extended between the arm sections 5| rearwardly of the scoop 53 (Figs. 2 and 5). A pair of pulleys 94 is oppositely arranged adjacent the free end of the collapsible frame 6| and rotatably supported on a shaft 96 extended between the members 62 of the frame 6|. A second 7 pair of pulleys 91 is oppositely arranged on the upright frame 38and pivotally supported adjacent the free ends of the connecting members 12 on pins 98 carried in the leg members 15. A third pair of pulleys 99 is oppositely arranged on the upright frame 38, and rotatably supported on the pivot pins 68 for connecting the members Mand 12. A cable 89 is operatively associated with corresponding ones of the pulleys 94, 9'! and 99, and with a corresponding winding drum 9 When the collapsible frame 6| is in its extended position on the upright frame 38, as shown in Figs. 1 and 2, the cables 89 are supported fromthe pulleys 94, with each cable from the sleeve member 92 travelling upwardly about .a pulley 94 and then downwardly to a winding drum 9|. It is thus seen that the arms 49 are capable of being lifted to a maximum position which is defined when the sleeve 92 is substantially at the level of the pulleys 94 as shown in Fig. 1.

With the frame 6| in its collapsed position shown in Fig. 8 the pulleys 9'|,are at an uppermostposition on the upright frame 38, and projected forwardly-of the upright frame, as shown in Figs 8 and 9 by virtue of the forward pivotal movement of the connecting members 12 in the manner'explained above. A cable 89 from the sleeve 92 thus extends upwardly about a pulley 91, then rearwardly longitudinally of the frame 6| about a pulley 94, then longitudinally forwardly of the frame 6|, about a pulley'99 and downwardly to a winding drum 9| (Fig. 8). In the collapsed position of the frame GI, therefore, the arms49,'and in turn the scoop 53, are supported from the pulleys 91, with the frame GI beingretained against pivotal movement forwardly to an upright position by virtue of the 'rearwardly and downwardly inclined position of the frame M from its pivotal supports 68.

Since the cables 89 are not in direct engagement with the pulleys 91 and 99, when the frame 6I is in an upright position, the pulleys 99 are 7 provided with cable guides IOI illustrated in Fig.

A-cable 89 is thus retained in an engaging position with the pulleys 91 and 99 for all moved positions of the frame BI relative to the frame 38. For raising and lowering the arms 49 I provide the hoisting mechanism 95 which includes the These drums are winding or cable drums 9I. mounted in an axially spaced relation on a shaft I40 rotatably supported between the frame members 39 adjacent the lower endv of the upright frame 38 (Figsl and 2). -A'pulley (4| rotatable on the shaft I40 is connected by a belt I42 with a powerftake-oif pulley I43 onthe tractor, and provided with a clutch member I44 splined to the shaft I40 and frictionally retained in drivenengagement with the pulley MI by a spring I46.

A bellcrank lever I4? is pivotally supported from 3 a cross member I48 connected between the frame members 39. A cable I49 has one end'attached to the lever I41 and the other end to a manually operated handle I50 pivoted from a frame structure II carried between the brace members'fl. On actuation of the handle I50 the shaftil is connected and disconnected from the pulley I4I. I The shaft. I40 also carries a brake. mechanism, indicated generally at I52, operatively connected through a rod I 53 with a manually actuated handle I54 pivoted on the frame structure I5I. This brake mechanism is described in detail in my copending application Ser. 458,043 and forms no part of my present invention.

It is contemplated that the upright frame 38 have a height of about twelve feet, and when extended with the frame BI that the over-all height of these two frames be about twenty-two feet. This h'eight of twelve feet gives all necessary clearance of my loader with the usual overhung electric and telephone wires. From a con- 'sideration of Fig. 8 it is seen that the arms 49 are pivoted on the member 46 at a position sub stantially opposite the top level of the upright frame 38 so that their pivotal support 50 is also about twelve feet above th'e level of the ground.

With the arms 49. pivoted at this elevation they assume an angle of about from their pivotal support when they are in their lowermost positions, and on being raised provide for the scoop 53 following a path upwardly and forwardly of the frames 38 and BI. This path of movement is accomplished by the pivotal arc of movement of the scoop 53 being in a'substantially vertical plane as provided by the relatively long length of the arms 49 and their pivotal support at a distance above the ground which is substantially equal to one-half of the over-all height of the upright 38 and the collapsibleframeSL l Because of the relatively large pivotal arc of travel of the scoop 53 it is apparent that the scoop will incline rearwardly at progressively greater angles as it is raised to its maximum position of elevation. 'The retention of the scoop in a substantially horizontal load-carrying position at all moved positions of the arms 49 is accomplished by means including an upright catch member I02 mounted on the rear wall of the scoop 53 and operatively engagealble with a latch member I03 to releasably hold the scoop 53 in a load-carrying position (Figs. 4 and 5).

The latch member I03 is pivotally supported at its rear end at I04 on the top of an inverted U-shape member 06 having its legs arranged in a straddling relation with the arms 49 and pivoted at their free ends on the shaft 93. The forward end of the latch member I03 is formed with a hook portion I01 having a cam surface I08. The catch member I02 i normally positioned within the hook I01 and releasably held therein b the action of a spring I09 connected at one end to the top of the U member I06 and at its opposite end to a lever portion III integral with the latch I03 and inclined outwardly from the hook [01. On pivotal movement of the U frame I06 in a direction rearwardly and forwardly of the tractor it is seen that the latch I03 is slidable longitudinally of the upright catch member I02, and acts on the catch to pivot the scoop about its pivots 54. This movement of the U frame I06, to in turn pivotally move the scoop 53, is accomplished by manually operated means comprising a rock shaft I I2 rotatably supported transversely of the U member 46 in bearings'II3 at a position substantially opposite the pivot 50 for the lifting arms 49 (Fig. 12). The rock shaft [I2 is integrally formed at each end with a downwardly extended rock arm II4.

Oppositely arranged and pivoted on the arms 49 are upright levers H6, with the lower end of each lever H6 being connected with a corresponding free end of a rock arm II4 by a link Ill. The upper end of each pivoted lever H6 is pivotally connected with the U frame I09 by a link I I8. Amanually operated lever H9 is mounted on the rock shaft II2 intermediate its ends, and is extended downwardl therefrom to a position adjacent the tractor operators seat I2I. It is thus seen that on actuation of the manual lever II9 the scoop 53' is pivotally moved so as to be maintained in a substantially horizontal position at any moved position of the arms 49, or at any elevated position of the scoop 53. The lever II9'rmay' be operatively associated with a suitable ratchet member (not shown) for holding it in a moved position. In some cases it might be desirable to connect the shaft H2 with a hand wheel (not shown) geared in a driving relation with the shaft II2.

The catch member I02 and the latch member I03 are released by the manual pulling rearwarclly on a flexible cable or rope I22 connected at one end to the hook portion I01 and extended through an eye member I24 on the U frame I06 to a position to one side of the upright frame 38, and then rearwardly through a hole I26 in the upper end of a pivoted lever H6 and through a loop memher I27 on the frame member 42 from which it is suspended at a position above the tractor operators seat I2I (Fig. 8). The dumping movement of the scoop 53, on release of the latching mechanism, is limited by a chain I25 connected at one end to. the sleeve 92 and at its opposite end adjacent the top of the back wall of the scoop 53 (Figs; 5 and 8).

After being dumped the scoop 53 is automatically returned to its loading position by oppositely arranged fiat spiral springs I28 each of which is mounted about a pivot 54 for the scoop 53 and between the scoop and a plate member 56 (Figs. 5, 6 and 7). One end I29 of a spring I28 is fixed to a plate 56, while its opposite end I3I is fixed to the scoop 53, with the pressure of the spring acting normally to move the scoop 53 in a counter-clockwise position as viewed in Fig. 6. The scoop on being dumped is pivotally moved in a clockwise direction, as also viewed in Fig. 6, whereby to store or build up a pressure within the springs I28. Oii being dumped this spring pressure is sufficient to overcome the normal weight of the scoop 53 to pivotall move the scoop 53 to a normal loading position. During this counter-clockwise movement of the scoop 53 the catch member I02 engages the cam surface I08 on the latch member I03 whereby to move the latch member in a clockwise direction, as viewed in Fig. 4, against the pressure of the spring I09. On passage of the catch member I02 between the hook I01 and lever III to its position shown in Fig. 4, the hook is moved to a releasably locked position with the catch member I by the spring I09.

From a consideration of the above description it is seen that I provide a loading attachment for a tractor which is preassembled as a pqrtable unit attachable with a tractor for movement therewith. The loader is capable, by virtue of the collapsible frame SI, of readily building either small or high stacks, and with the frame 6| in a collapsed position between the front upright frame 38 and the rear upright frame comprised of the arch 23 and member 46, providing for its over-all-height being reduced such that it has sufficient clearance with all overhanging wires for highway travel. High stacks are capable of being built by the use of relatively long pivoted lifting arms 49 which are pivoted at their rear ends an appreciable distance above the ground level and relatively constructed and assembled with their supporting frame such that the pivotal supports are substantially free of any bucking force applied to the scoop 53 carried at the forward ends of the arms. Further means are provided whereby the scoop 53 is manually adjusted so as to be retained in a: substantially horizontal position at any moved position of the lifting arms. 1

Although I have described my invention with respect to a preferred embodiment thereof it is to be understood that it is not to be so limited since changes and modifications can be made therein which are within the intended scop of my invention as defined by the appended claims.

I claim:

1. A loading attachment for a tractor including a portable frame attachable with the tractor for movement therewith, a front upright portion and a rear upright portion on said frame, frame members connecting together said two upright portions, a pair of pivoted lifting arms arranged at opposite sides of said frame, means pivotally supporting said arms on said rear upright portion at a position substantially opposite the top level of said front upright portion, a load-carrying means carried between the front ends of said arms forwardly of said upright portion, a

collapsible extension for said front upright porto a collapsed position between said two upright portions, flexible lifting means for said arms, a first means adjacent the top of said front upright portion and other means adjacent the top of said extension for movably supporting said lifting means, with the load on said lifting means being suspended from said first means when said extension is collapsed, and from said other means when the extension is in an upright position, and means operated by the tractor for raising and lowering said lifting means.

2. A loading machine for a tractor comprising a portable frame unit attachable with the tractor for movement therewith, including a front member and a front axle pivoted forwardly on said front member for pivotal movement transversely of said portable frame unit, means providing for the support of the rear end of said portable frame on the tractor, a rear upright frame on said portable unit, a load-carrying frame unit having a front upright frame carried on said front axle, and a frame extended rearwardly from said front upright frame at a position adjacent the top thereof, means pivoting the rear end of said rearwardly extended frame on said rear upright frame, with said pivoted axle and said pivot means providing for the pivotal movement of said load-carrying unit about an axis extended longitudinally thereof, an upright portion at the rear end of said rearwardly extended frame, a pair of pivoted lifting arms arranged at opposite sides of said load-carrying unit, means pivoting said arms at their rear ends adjacent the upper end of said upright portion, a frame extension pivotally supported on said front upright frame, means for holding said extension in an upright position on said front upright frame and providing for the pivotal movement of said extension to a collapsed position between said front upright frame and said rear upright frame, a first pulley means adjacent the top of said front upright frame, a second pulley means adjacent the free end of said extension, flexible lifting means movably supported on said two pulley means and operatively connected with the front portion of said arms, with the load on said lifting means being supported from said first pulley means when the extension is in said collapsed position, and from said second pulley means when said extension is in an upright position, and means for operating said lifting means to pivotally raise and lower said arms.

3. A loading attachment for a tractor including a portable frame attachable with the tractor for movement therewith, an upright frame adjacent the front end of said portable frame, a collapsible extension for said upright frame, means pivotally supporting said extension on said upright frame for movement to a position extended rearwardly from said upright frame, and to an upright position on said upright frame, a pair of upright members oppositely arranged on said upright frame and pivoted at their lower ends on said upright frame, with their upper ends frame, a first pair of pulleys oppositely arranged on said upper ends, a pair of connecting members oppositelyarranged onsaid extension and projected downwardly from the lower end of said extension, with each said connecting members being in a pin and slot connection with-a corresponding upright member, said upright members, on movement of said extension to a collapsed position, being movable by said connecting members so that said upper ends are pond pair -of pulleys oppositely arranged .on said extension adjacent said lower end thereof, a third pair of pulleys oppositely arranged on said extension adjacent; the upper end thereof, a loadcarrying unit movably supported on said portable frame for up and down movement forwardly of said upright frame, and a flexible lifting means connected with said load-carrying unit and operatively associated with said pulleys, said lifting means, when said extension is in an upright position, being supported from said third pair of pulleys and free of said first and second pairs of pulleys, and with the lifting means, when said extension is in a collapsed position, being supported from said first pair of pulleys and in operative engagement with said second and third pairs of pulleys. v V

4. A loading attachment for a tractor comprising a. portable frame attachable with the tractor for movement therewith, a front upright frame and a rear upright'frame on said portable frame, a p ir f loadif i g arms arr ng d at opposite sides of said two upright frames and pivoted at their rear end on aid r rvupright frame at a position substantially opposite the top level of said front upright frame, a collapsible frame pivoted at one end on said front upright frame for pivotal movement to an upright position on said front upright frame, and to a collapsed position between sa d two upri ht frames, a p ir of pp itely arrang d members projected outwardly igl'i i member whereby the freeends of said upright members are moved forwardly of said front upright frame on movement of said collapsible frame to a collapsed position, flexible lifting means operatively connected with the front ends of saidpivoted arms, means movably supporting. said lifting means including a first pair ofpulleys oppositely arranged at the free ends of said upright members, and a second pair of pulleys op positely arranged adjacent the other end of said collapsible frame, with said lifting means being suspended from said first pair of pulleys when means foroperat-ing said lifting means to pivotally raise and lower said arms.

5-. A loading attachment for a tractor comprising a portable unit attachable: with the tractor for movement therewith, an upright front frame and an upright rear frame on said portable unit, a pair of pivoted arms arranged a l? QPDOsite sides of said two upright frames and pivoted at their rear ends adjacent the top of said rear upright frame, with the front ends of said arms projected forwardly of said front upright frame, flexible lifting means movably supported from said front upright frame, means for operating said flexible lifting means to pivotally raise and lower said arms, a load-carrying unit pivoted between the front ends'c-f said arms, means for holding said load-carrying unit in a, loading position including an upright catch member on said load-carrying unit, a latch operatively engageable with 2,883,686 I sitioned forwardly of said upright frame, a secsaid catch member and slidable longitudinally of said catch member in a latched position, supporting means for said latch pivoted on said arms for pivotal movement longitudinallyof said arms, a rock shaft rotatably supported in said rear upright frame, a rock arm adjacent each end of said shaft, a manually operated member con nected with saidshaft intermediate the ends of said shaft, a pair of upright pivoted levers oppositely arranged onsaid arms, link means connecting one free end of each said pivoted levers with a corresponding rock arm, and the other free end of each said pivoted levers with said pivoted supporting means, with actuation of said manually operated member providing for the pivotal movement of said load-carryingunit at any moved position of said arms and with said loadcarrying unit held in a load-carryingposition by v said catch member and said latch member.

6. A loadingmachinecomprising a portable frame, an upright frame adjacent one end of said portable frame, a pair of pivoted lifting arms arranged at opposite sides of said upright frame, a load-carrying means supported between said arms forwardly of said upright frame, means including flexible lifting means for lowering and raising said lifting arms, a collapsible extension movably carried on said upright frame for movement to a first position extended upwardly from said upright frame, and toa second position extended rearwardly and downwardly from said upright frame, means for holding said extension in each of said first and second positions, a first means adjacent the free end of said extension for movably supporting said lifting means when the extension is in said first position, and other means adjacent the top of said upright frame for movably supporting said lifting means when'the extension is in said second position.

'7. In a loading machine, having a pair of pivoted, oppositely arranged load-carrying arms, an upright frame between said arms, a collapsible extension movaloly supported on said frame for movement to a first position extended upwardly from said frame and to a second position below the top level of said frame, means for lowering,

.and raising said arms including flexible lifting means, means for movably supporting said lifting means adjacent the top of said frame when the extension is in said second position, and means for movably supporting said lifting means adjacent the top of said extension when the extension is in said first position.

n a loa ing m chine. an upright frame having a pivoted top portion movable to an upright position and to a collapsed position extended rearwardly and downwardly from said upright frame, load-carrying means movably supported for up and down movement forwardlviof said upright frame, means-for raising and lowering said load-carrying means including flexible lifting means, means adj acentthe topof said frame for movably supporting said lifting means when said top portion is in a collapsed position, and means for movably supporting said lifting means adjacent the free end of said top portion when the top portion is'in said upright position, with said lifting means being'movable on said last mentioned means with the top portion'in said collapsed position.

JOHN E. RYAN. 

